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← ScienceWhich mechanism causes increased orbital radius in spacecraft?
A)Spacetime curvature alters geodesic paths✓
B)Thruster efficiency declines with time
C)Solar wind ablates spacecraft material
D)Gravitational harmonics perturb Keplerian orbits
💡 Explanation
Spacetime curvature causes deviation from purely Newtonian orbits; a mechanism called the Geodesic Effect causes the spacecraft's path to change because spacetime is warped by the Earth's mass; therefore orbital radius increases, rather than other perturbing effects like atmospheric drag.
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